A small tree or shrub. It can grow between 1.5 and 12.5 m tall. The stems are grey brown and finely rough. The leaves have 3 leaflets. They tend to be oval and 5.5-14 cm long by 1.6-10 cm wide. The leaflets are oval with silky hairs underneath. The leaflets are 3-5 cm long by 1.5-3 cm wide. The tip tends to be rounded. The leaf stalk is 2-3 cm long. The flowers are 1.5-2 cm long and have a scent. The flower clusters occur in the axils of leaves on very short stalks. The petals can be white or yellow and often there is a greenish patch near the base of the standard. They are 1 cm across. The fruit are pods 1-5 cm long. They become hard and woody. There are 2-7 segments in the pod. They are only slightly indented along the edge. It does not split open.